Archive for the ‘I/O Modules’ Category

TIED IN KNOTS – A Must-Have Guide to Untangling USB Extension Options for PC Based Automation

Wednesday, August 19th, 2009

Understand Your Options

Understand Your Options

Stop Your USB Devices From Being Shackled to a PC Like the Pretty Boy on a Chain Gang (He Can't Wait to Get Free!)

Most people believe USB connections are constrained to 5 meters from the PC. In PC based automation projects they toil with PC and device placement.

It's never been easier to free yourself from this restriction. (more…)

Links to USB Extension Products

Wednesday, August 19th, 2009

In TIED IN KNOTS – A Must-Have Guide to Untangling USB Extension Options for PC Based Automation, I discussed several methods for extending the USB connection between the computer and the device. While these solutions exist, not all of them are easy to find. Here are a few product links for each solution. (more…)

Understanding Expert I/O 1000 Access Times

Friday, August 14th, 2009

Expert I/O Timing

Expert I/O Timing

I often get questions about the Expert I/O 1000’s access time characteristics. The short answer is that you can change outputs at a rate of 100Hz and you can read inputs at 50Hz. However, the complete answer is more complicated.

When dealing with MS Windows on a PC, it’s not possible to get absolute realtime results. You will always have some variability in timing. However, Dajac’s USB implementation directly associates the timing to guaranteed values in the USB specification. Therefore, we know the guaranteed worst case access times at the USB level. (more…)

ADI Makes USB Electrical Isolation Simple

Friday, July 31st, 2009

Single-IC USB isolation.

Single-IC USB isolation.

Worried about using USB connected devices because they lack electrical isolation? Worry no more. Your life is about to get incredibly simpler. Analog Devices has answered your prayers with their new iCoupler ADuM4160 single chip USB isolation solution. Combine it with the ADuM5000 and isolate the power as well.

The ADuM4160 is the industry’s first single-IC USB isolator that meets medical and industrial standards while replacing complex board level solutions. The ADuM4160 offers 5kV rms medical-grade isolation as well as upstream short-circuit protection. (more…)


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